On my 87 350 TPI I pulled the plenum and runners off to pull the fuel rail, Now on the LH runner where it bolts to the intake (on the backside of the engine by #7) when I started to loosen the bolts I heard this suction noise and could not figure out what was causing it. Well when I got the runner off I noticed I had coolent on the intake right below the holes for the runner. Well I cleaned it off and then the coolent came back. Turns out It's coming from the bolt hole that the runner mounts into?? How and why is coolent coming up thru this bolt hole on my intake? It's a new Accel Intake and It's only been on the car for 20 miles the engine has only been back together for 20 miles. Does anyone have any ideas why? I'm confused?

[This message has been edited by Jas87T/A (edited May 01, 2001).]

 

I'd have to say that the bolt hole is drilled into a water passage in the manifold,
and every time the bolt is out it leaks, or it may leak with the bolt in also. This is really the only way coolant would get there by #7. The suction sound was air getting into the system i bet. I'm not sure if this is a flaw in the manifold or if the accel ones are like that; i sure hope not cause i have one on back order. If you find out let me know.
Good luck.

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'88 RS (originally 2.8)
-350, .040 over, vette alum. L98s, stock tpi.
-305 injectors & chip
-TES headers & edelbrock cat back
-3.73 gears, 700r4.
Best with 2.8-17.4@77mph
Best with 305-15.0@93mph
Best with 356-13.7@101mph
on a 2.050 60 ft.
(Damn the 2.8!)

 

Mine leaks at the rear holes above #8, where the coil bracket bolts to the intake. All I can figure is: 1-The bolt hole goes into the coolant passage, or 2-I have a gasket leak when I loosen the bolts and take the pressure off. I won't know until I pull the intake off, and I won't be doing that for a while. FYI..